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Preparation for dynamic tmpfs path

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topjohnwu
2020-04-12 05:34:56 -07:00
parent d739dcac2b
commit e0a281583d
13 changed files with 289 additions and 258 deletions
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43
native/jni/init/mount.cpp
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@ -175,7 +175,6 @@ void RootFSInit::early_mount() {
full_read("/init", self.buf, self.sz);
LOGD("Reverting /init\n");
root = xopen("/", O_RDONLY | O_CLOEXEC);
rename("/.backup/init", "/init");
mount_root(system);
@ -186,7 +185,7 @@ void RootFSInit::early_mount() {
xmkdir("/dev/mnt", 0755);
mount_persist("/dev/block", "/dev/mnt");
mount_list.emplace_back("/dev/mnt/persist");
mount_list.emplace_back("/dev/mnt/cache");
persist_dir = "/dev/mnt/persist/magisk";
}
void SARBase::backup_files() {
@ -261,13 +260,45 @@ void BaseInit::cleanup() {
mount_list.shrink_to_fit();
}
void mount_sbin() {
LOGD("Mount /sbin tmpfs overlay\n");
xmount("tmpfs", "/sbin", "tmpfs", 0, "mode=755");
static void patch_socket_name(const char *path) {
char *buf;
size_t size;
mmap_rw(path, buf, size);
for (int i = 0; i < size; ++i) {
if (memcmp(buf + i, MAIN_SOCKET, sizeof(MAIN_SOCKET)) == 0) {
gen_rand_str(buf + i, 16);
i += sizeof(MAIN_SOCKET);
}
}
munmap(buf, size);
}
xmkdir(MAGISKTMP, 0755);
void setup_tmp(const char *path, const raw_data &self, const raw_data &config) {
LOGD("Setup Magisk tmp at %s\n", path);
xmount("tmpfs", path, "tmpfs", 0, "mode=755");
chdir(path);
xmkdir(INTLROOT, 0755);
xmkdir(MIRRDIR, 0);
xmkdir(BLOCKDIR, 0);
mount_persist(BLOCKDIR, MIRRDIR);
int fd = xopen(INTLROOT "/config", O_WRONLY | O_CREAT, 0);
xwrite(fd, config.buf, config.sz);
close(fd);
fd = xopen("magiskinit", O_WRONLY | O_CREAT, 0755);
xwrite(fd, self.buf, self.sz);
close(fd);
dump_magisk("magisk", 0755);
patch_socket_name("magisk");
// Create applet symlinks
for (int i = 0; applet_names[i]; ++i)
xsymlink("./magisk", applet_names[i]);
xsymlink("./magiskinit", "magiskpolicy");
xsymlink("./magiskinit", "supolicy");
chdir("/");
}